Search results for: M. Shanmugam

Items from 1 to 20 out of 48 results

article

Analysis of electron paramagnetic resonance and optical studies of central metal ion (Cu²⁺) in lithium potassium phthalate single crystal

N. Subbulakshmi, S. Radha Krishnan, V. M. Shanmugam, P. Subramanian

Applied Physics A > 2019 > 125 > 2 > 1-9

Molecular ion Cu²⁺ in lithium potassium phthalate (LiKP) single crystal has been grown at room temperature by slow evaporation process. Single crystal EPR study has been taken for the LiKP:Cu²⁺ crystal. Presence of two Cu²⁺ sites is reported from EPR data. Angular variation plot in the three planes is used to determine the principal g and A values. Spin Hamiltonian parameter values reveal that site...

article

Impact of graphene on the enhancement of electrochemical and photocatalytic performance of Gd2O3 - Graphene nanocomposites

T. Saravanan, P. Anandan, M. Shanmugam, T. Jayakumari, more

Solid State Sciences > 2018 > 83 > C > 171-180

Gadolinium oxide - Graphene (Gd₂O₃-G) nanocomposites were prepared with different weight ratio of graphene using low temperature solution process. The structural, morphological, electrochemical and photocatalytic properties of the composites were investigated by X-ray diffraction, Raman, FE-SEM, HRTEM, Cyclic voltammetric and photo-degradation analysis. The chemical composition of the composites was...

article

Insights from within activity based learning (ABL) classrooms in Tamil Nadu, India: Teachers perspectives and practices

Nidhi Singal, David Pedder, D. Malathy, M. Shanmugam, more

International Journal of Educational Development > 2018 > 60 > C > 165-171

•Teachers overwhelmingly noted that ABL classrooms were better places for learning and nurturing children with different abilities.•Visible in practice were various dilemmas, trade-offs and constraints in complying with ABL principles.•Teachers provided sophisticated reflections on how to adapt ABL principles in response to large and under-resourced classrooms.

article

Role of de‐N‐acetylase PgaB from Aggregatibacter actinomycetemcomitans in exopolysaccharide export in biofilm mode of growth

M. Shanmugam, A.O. Oyeniyi, C. Parthiban, S.K. Gujjarlapudi, more

Molecular Oral Microbiology > 32 > 6 > 500 - 510

Aggregatibacter actinomycetemcomitans, a Gram‐negative bacterium, is the causative agent of localized aggressive periodontitis. Attachment to a biotic surface is a critical first step in the A. actinomycetemcomitans infection process for which exopolysaccharides have been shown to be essential. In addition, the pga operon, containing genes encoding for biosynthetic proteins for poly‐N‐acetyl glucosamine...

article

Evaluation of DNA methylation and mRNA expression of heat shock proteins in thermal manipulated chicken

A. Vinoth, T. Thirunalasundari, M. Shanmugam, A. Uthrakumar, more

Cell Stress and Chaperones > 2018 > 23 > 2 > 235-252

Thermal manipulation during embryogenesis has been demonstrated to enhance the thermotolerance capacity of broilers through epigenetic modifications. Heat shock proteins (HSPs) are induced in response to stress for guarding cells against damage. The present study investigates the effect of thermal conditioning during embryogenesis and thermal challenge at 42 days of age on HSP gene and protein expression,...

article

The effect of potassium-rich biostimulant from seaweed Kappaphycus alvarezii on yield and quality of cane and cane juice of sugarcane var. Co 86032 under plantation and ratoon crops

K. Karthikeyan, M. Shanmugam

Journal of Applied Phycology > 2017 > 29 > 6 > 3245-3252

A field experiment was conducted during 2011–2015 to study the effect of potassium-rich biostimulant manufactured from seaweed Kappaphycus alvarezii on growth, yield, and quality of sugarcane var. Co 86032 with plant and three consecutive ratoon crops. The concentrated biostimulant manufactured from K. alvarezii had 17.45% of solid content with majority potash (11.28%) and other macro-micro nutrients...

article

Structural and functional analysis of de‐N‐acetylase PgaB from periodontopathogen Aggregatibacter actinomycetemcomitans

C. Parthiban, D. Varudharasu, M. Shanmugam, P. Gopal, more

Molecular Oral Microbiology > 32 > 4 > 324 - 340

The oral pathogen Aggregatibacter actinomycetemcomitans uses pga gene locus for the production of an exopolysaccharide made up of a linear homopolymer of β‐1,6‐N‐acetyl‐d‐glucosamine (PGA). An enzyme encoded by the pgaB of the pga operon in A. actinomycetemcomitans is a de‐N‐acetylase, which is used to alter the PGA. The full length enzyme (AaPgaB) and the N‐terminal catalytic domain (residues 25–290,...

article

Successful establishment of commercial farming of carrageenophyte Kappaphycus alvarezii Doty (Doty) in Sri Lanka: Economics of farming and quality of dry seaweed

M. Shanmugam, K. Sivaram, E. Rajeev, V. Pahalawattaarachchi, more

Journal of Applied Phycology > 2017 > 29 > 6 > 3015-3027

Kappaphycus alvarezii seed material was brought from Malaysia in 2011 to initiate cultivation in Sri Lanka. After conducting trial cultivation, the results were found encouraging and commercial farming was started in mid-2012 at Valaipadu village. The average daily growth rates (ADGRs) using bamboo raft method were varied from 3.44 ± 0.12 to 4.45 ± 0.85% in 2014 and 3.47 ± 0.33 to 4.51 ± 0.58% in...

article

An appraisal on commercial farming of Kappaphycus alvarezii in India: success in diversification of livelihood and prospects

Vaibhav A. Mantri, K. Eswaran, M. Shanmugam, M. Ganesan, more

Journal of Applied Phycology > 2017 > 29 > 1 > 335-357

There is an urgent need for diversifying livelihood of low-income artisanal fishermen due to rapidly dwindling fishery resources. CSIR-Central Salt and Marine Chemicals Research Institute takes pride in being first for pioneering Kappaphycus alvarezii cultivation, heralding an era of commercial seaweed farming in India. The invention of liquefying fresh seaweed biomass to obtain two products in an...

article

Experimental characterization of Silicon Drift Detector for X-ray spectrometry: Comparison with theoretical estimation

M. Shanmugam, Y.B. Acharya, S.V. Vadawale, H.S. Mazumdar

Measurement > 2016 > 91 > C > 66-72

Reverse saturation current and the ideality factor (η) are the main parameters that affect the performance of a radiation semiconductor detector in different space environmental conditions. We have measured both of these parameters for the Silicon Drift Detector (SDD) used as a radiation detector in the X-ray spectrometry for space borne applications having the active area of 40mm² and 109mm² with...

article

Surface display of Aggregatibacter actinomycetemcomitans autotransporter Aae and dispersin B hybrid act as antibiofilm agents

C. Ragunath, K. DiFranco, M. Shanmugam, P. Gopal, more

Molecular Oral Microbiology > 31 > 4 > 329 - 339

Among the various proteins expressed by the periodontopathogen Aggregatibacter actinomycetemcomitans, two proteins play important roles for survival in the oral cavity. The autotransporter Aae facilitates the attachment of the pathogen to oral epithelial cells, which act as a reservoir, while the biofilm‐degrading glycoside hydrolase dispersin B facilitates the movement of daughter cells from the...

article

Development of a hard x-ray focal plane compton polarimeter: a compact polarimetric configuration with scintillators and Si photomultipliers

T. Chattopadhyay, S. V. Vadawale, S. K. Goyal, Mithun N. P. S., more

Experimental Astronomy > 2016 > 41 > 1-2 > 197-214

X-ray polarization measurement of cosmic sources provides two unique parameters namely degree and angle of polarization which can probe the emission mechanism and geometry at close vicinity of the compact objects. Specifically, the hard X-ray polarimetry is more rewarding because the sources are expected to be intrinsically highly polarized at higher energies. With the successful implementation of...

article

Effect of thermal manipulation during embryogenesis on liver heat shock protein expression in chronic heat stressed colored broiler chickens

A. Vinoth, T. Thirunalasundari, Jenny Anne Tharian, M. Shanmugam, more

Journal of Thermal Biology > 2015 > 53 > Complete > 162-171

Thermal manipulation during embryogenesis has been shown to improve thermo tolerance in broilers. Heat shock proteins are a family of proteins produced in response to variety of stress and protect cells from damage. The aim of this study was to evaluate the effect of thermal manipulation (TM) during embryogenesis on HSP gene and protein expression in the embryos and in chronic heat stressed 42nd day...

article

Thermal manipulation during embryogenesis improves certain semen parameters in layer breeder chicken during hot climatic conditions

M. Shanmugam, A. Vinoth, K.S. Rajaravindra, U. Rajkumar

Animal Reproduction Science > 2015 > 161 > Complete > 112-118

Thermal manipulation during incubation has been shown to improve post hatch performance in poultry. The aim of the present experiment was to evaluate thermal manipulation on semen quality of roosters during hot climatic conditions. Eggs obtained after artificial insemination from Dahlem Red layer breeders were randomly divided into two groups control (C) and heat exposed (HE). C group eggs were incubated...

chapter

Space radiation induced displacement damage effects on the performance of the silicon drift detector onboard chandrayaan-2 mission

M. Shanmugam, S. V. Vadawale, Y. B. Acharya, H. S. Mazumdar

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) > 1 - 5

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

The space radiation induced displacement damage effects on the performance of the Silicon Drift Detector (SDD) based X-ray spectrometer has been studied using X-ray (Fe-55) and gamma ray (Co-60) radiations. The spectroscopic performance of the SDD based spectrometer degrades due to radiation damage during the transit and in-orbit operations. Silicon detectors are sensitive to displacement damage which...

article

Targeting metabolism in multiple myeloma enhances BIM binding to BCL-2 eliciting synthetic lethality to ABT-199

R. Bajpai, S.M. Matulis, C. Wei, A.K. Nooka, more

Clinical Lymphoma Myeloma and Leukemia > 2015 > 15 > Supplement 3 > e231

article

A study on the continuance participation in on-line communities with social commerce perspective

Nick Hajli, Mohana Shanmugam, Philip Powell, Peter E.D. Love, more

Technological Forecasting & Social Change > 2015 > 96 > Complete > 232-241

This study investigates the constructs and related theories that drive continuance participation in on-line communities from their intention and behaviour perspectives. The research uses theories of ‘social support’ and ‘planned behaviour’ to propose a research model that drives continuance participation in on-line communities in Malaysia. The model reveals that the constructs perceived behavioural...

chapter

Efficient personal identification using multimodal biometrics

Ahilandeswari, U Prabu, G Priyadharshini, M Saranya, more

2015 International Conference on Circuits, Power and Computing Technologies [ICCPCT-2015] > 1 - 5

2015 International Conference on Circuit, Power and Computing Technologies (ICCPCT)

For recent years, the use of personal identity systems using multimodal biometrics has been increasing tremendously in number of fields. Although the Unimodal biometric systems serve well in various areas, it is notable that they have disadvantages regarding security and accuracy. Multimodal biometric systems focus on combining more than one possible biometric technology in order to secure the applications...

article

Alpha Particle X-Ray Spectrometer (APXS) on-board Chandrayaan-2 rover

M. Shanmugam, S.V.S. Murty, Y.B. Acharya, S.K. Goyal, more

Advances in Space Research > 2014 > 54 > 10 > 1974-1984

Alpha Particle X-ray Spectrometer (APXS) payload configuration for Chandrayaan-2 rover has been completed recently and fabrication of mechanical assembly, PCB layout design and fabrication are in progress. Here we present the design and performance evaluation of various subsystems developed for APXS payload. The low energy threshold of <1keV and the energy resolution of ∼150eV at 5.9keV, for the...

article

Solar X-ray Monitor (XSM) on-board Chandrayaan-2 orbiter

S.V. Vadawale, M. Shanmugam, Y.B. Acharya, A.R. Patel, more

Advances in Space Research > 2014 > 54 > 10 > 2021-2028

The remote X-ray fluorescence spectroscopy is a powerful technique to investigate the elemental abundances in the atmosphere-less planetary bodies. The experiment involves measuring spectra of fluorescent X-rays from lunar surface using a low energy X-ray detector onboard an orbiting satellite. Since the flux of fluorescent X-ray lines critically depend on the flux and spectrum of the incident solar...

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Search results for: M. Shanmugam

Analysis of electron paramagnetic resonance and optical studies of central metal ion (Cu²⁺) in lithium potassium phthalate single crystal

Impact of graphene on the enhancement of electrochemical and photocatalytic performance of Gd2O3 - Graphene nanocomposites

Insights from within activity based learning (ABL) classrooms in Tamil Nadu, India: Teachers perspectives and practices

Role of de‐N‐acetylase PgaB from Aggregatibacter actinomycetemcomitans in exopolysaccharide export in biofilm mode of growth

Evaluation of DNA methylation and mRNA expression of heat shock proteins in thermal manipulated chicken

The effect of potassium-rich biostimulant from seaweed Kappaphycus alvarezii on yield and quality of cane and cane juice of sugarcane var. Co 86032 under plantation and ratoon crops

Structural and functional analysis of de‐N‐acetylase PgaB from periodontopathogen Aggregatibacter actinomycetemcomitans

Successful establishment of commercial farming of carrageenophyte Kappaphycus alvarezii Doty (Doty) in Sri Lanka: Economics of farming and quality of dry seaweed

An appraisal on commercial farming of Kappaphycus alvarezii in India: success in diversification of livelihood and prospects

Experimental characterization of Silicon Drift Detector for X-ray spectrometry: Comparison with theoretical estimation

Surface display of Aggregatibacter actinomycetemcomitans autotransporter Aae and dispersin B hybrid act as antibiofilm agents

Development of a hard x-ray focal plane compton polarimeter: a compact polarimetric configuration with scintillators and Si photomultipliers

Effect of thermal manipulation during embryogenesis on liver heat shock protein expression in chronic heat stressed colored broiler chickens

Thermal manipulation during embryogenesis improves certain semen parameters in layer breeder chicken during hot climatic conditions

Space radiation induced displacement damage effects on the performance of the silicon drift detector onboard chandrayaan-2 mission

Targeting metabolism in multiple myeloma enhances BIM binding to BCL-2 eliciting synthetic lethality to ABT-199

A study on the continuance participation in on-line communities with social commerce perspective

Efficient personal identification using multimodal biometrics

Alpha Particle X-Ray Spectrometer (APXS) on-board Chandrayaan-2 rover

Solar X-ray Monitor (XSM) on-board Chandrayaan-2 orbiter

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